Republican Roy Moore may be expelled from Senate before he's seated

Members of the US Senate have said they would vote to expel a potential colleague before he is even seated after a series of allegations about inappropriate or predatory relationships with teenage girls.

But the former judge is accused of preying on five different teenage girls when he was a prosecutor in his 30s.

Republican and Democratic senators alike have demanded Moore step aside for another candidate before the December 12 election day.

"If he refuses to withdraw and wins, the Senate should vote to expel him," Colorado senator Cory Gardner said.

"If the choice is between Roy Moore and a Democrat, I would run to the polling place to vote for the Democrat," Arizona senator Jeff Flake tweeted.

"The appearance of grossly reprehensible behaviour disqualifies him from service in the United States Senate. If he does not step aside, we need to act to protect the integrity of the Senate," tweeted Indiana's Todd Young.

But while out-of-state politicians have turned their backs on Moore, he still has the support of many Republicans.

"The Bezos-Amazon-Washing Post that dropped that dime on Donald Trump is the same Bezos-Amazon-Washington Post that dropped the dime this afternoon on Judge Roy Moore," former Trump staffer Steve Bannon said.

"Now is that a coincidence?"

Roy Moore. (AAP) ()

Bannon, who campaigned for Moore against the Trump-endorsed opponent Luther Strange, was referring to the Washington Post breaking the story of Moore's alleged abuses.

Moore himself did not outright deny the accusations made against him during an interview with Fox News host Sean Hannity.

When asked if he ever dated teenage girls when he was a grown man, he replied: "That wasn't my customary behaviour."

"I don't remember ever dating any girl without the permission of her mother."

But Moore stands a solid chance of winning the election despite the accusations, thanks to the stubbornly Republican Alabama electorate.

A new poll conducted in the wake of the allegations has shown Moore ahead of his Democratic opponent Doug Jones.

The Emerson poll shows Moore with a ten-point lead on Jones.

Jones is a former federal prosecutor known for locking up the Ku Klux Klansmen responsible for the 1963 Birmingham church bombing.

Beverly Young Nelson is comforted by lawyer Gloria Allred. (AAP) ()

The bombing killed four young black girls but it took nearly 40 years for the last two perpetrators to be convicted.

Jones has been running a fairly typical Democratic campaign, pushing for an increase in the minimum wage, maintaining Obamacare and investing in renewable energy.

He was considered a very long shot for the special election, barely a year after Hillary Clinton won just 34 percent of the vote in the Deep South state.

A Moore loss would contract the Republicans' Senate majority to a narrow 51-49 edge.

If Moore stands aside, it is too late for his name to be replaced on the ballot.

Instead Republicans would have to pin their hopes on enough voters writing in an alternative option in a blank space on the ballot.